66 COLLINS AND HERVEY. 



the plant distributed as ^Y. N. & L., No. 1586. The CM Pool plants 

 have mostly more distant ramuli, but some individuals are quite 

 typical. At Hungry Bay a form was found in which the ramuli were 

 produced on one side of the frond only; not secund in the usual sense, 

 as they were not in a single series, but were placed, apparently irregu- 

 larly, on one semi-cylinder of the axis, the other being naked. 



Var. LAETEviRENS (Mout.) Weber, 1898, p. 366, PI. XXXIII, figs. 

 8, 16-22; Borgesen, 1907, p. 386, fig. 30; 1913, p. 154, fig. 125; Col- 

 lins, 1909, p. 420; P. B.-A., No. 2020. C. laetevirens Montagne, 1842, 

 p. 16. Kemp, in herb.; Wadsworth, No. 70; Walsingham, March, 

 Hervey; Tucker's Town, April, Cooper's Island, Aug., Collins. 



10. C. cupRESsoiDEs (Vahl) Agardh, 1822, p. 441; Weber, 1898, 

 p. 323; Collins, 1909, p. 416; Fucus cupressoides Vahl, 1802, p. 29. 

 A species containing many forms, all intergrading, once held to be 

 distinct species. 



Var. TYPiCA Weber, 1898, p. 326; Borgesen, 1907, p. 368, figs. 14-16; 

 1913, p. 137, figs. 109-111. South Beach, Paget, Farlow. 



Var. MAMiLLOSA (Mont.) Weber, 1898, p. 332, PL XXXVIII, figs. 

 2-7; Collins, 1909, p. 417;. Alg. Am.-Bor. Exsicc, No. 96; P. B.-A., 

 No. 1920; Caulerpa mamillosa Montagne, 1842, p. 13. Outer reef, 

 Ely's Harbor, July, Somerset Bridge, July, Gravelly Bay, Aug., Collins. 

 At Gravelly Bay it grew exposed to the waves, the stolon adhering 

 firmly to the rock and covered with sand, so that only the short fronds 

 were visible, often only the tips. 



Var. ERiciFOLiA (Turn.) Weber, 1898, p. 335; Collins, 1909, p. 417; 

 Fucus ericifolius Turner, 1808, p. 124, PI. LVI, " found at Bermuda 

 Islands, Herb. Banks." Kemp, in herb, as C. ericifolia; Gravelly 

 Bay, Aug., Collins. A few plants at Gravelly Bay, among var. 

 mamillosa, distinguished by the cylindrical ramuli. 



C. Ashmeadii Harvey, is recorded in Collins, 1909, p. 414, as occur- 

 ring at Bermuda. We have not been able to confirm this record, 

 and as we have not ourselves found this species, we do not include 

 it in the present work. 



Family VAUCHERIACEAE. 

 Vaucheria DC 



*V. sphaerospora Nordstedt, 1878, p. 177, PI. II, figs. 7-8; 

 Collins, 1909, p. 429. In "Millbrook" Dec, CoUins, with oogonia 

 and antheridia. This species has been found in Greenland, Denmark, 



